HomeHome BlogBlog TwitterTwitter YouTubeYouTube ContactContact

ACA_db for AutoCAD Architecture database connectivity

About | Download | System requirements | Purchase
Documentation | License agreement | Revision History | Customers


Make use of AutoCAD Architecture or AutoCAD MEP more fully in your BIM process. Property Set values can automatically be updated back and forth to one or many external databases. If you make changes to the Extended Data values within a Property Set they can be synchronized back to the external database. Any Property in a Property Set Definition can be exported and all editable Properties can be imported.

Synchronization between database and CAD 

ACA_db will improve the BIM process and experience and will improve quality of your data and remove redundancy and conflicts of data.


Contact us to get a time limited license file for free. (156KB) only for 2013, 2014 and 2015. Version 4.0 supporting 32-bit and 64-bit. (159KB) only for 2010, 2011 and 2012. Version 4.0 supporting 32-bit and 64-bit. (236KB) only for 2010, 2011 and 2012. Version 3.0. 32-bit only. (236KB) only for 2009-versions. Version 3.0. 32-bit only. (236KB) only for 2008-versions. Version 3.0. 32-bit only. Access and SQL Server sample databases.

System requirements

AutoCAD Architecture 2015 (ACA 2015) or AutoCAD MEP 2015 (AMEP 2015).
AutoCAD Architecture 2014 (ACA 2014) or AutoCAD MEP 2014 (AMEP 2014).
AutoCAD Architecture 2013 (ACA 2013) or AutoCAD MEP 2013 (AMEP 2013).
AutoCAD Architecture 2012 (ACA 2012) or AutoCAD MEP 2012 (AMEP 2012).
AutoCAD Architecture 2011 (ACA 2011) or AutoCAD MEP 2011 (AMEP 2011).
AutoCAD Architecture 2010 (ACA 2010) or AutoCAD MEP 2010 (AMEP 2010).
AutoCAD Architecture 2009 (ACA 2009) or AutoCAD MEP 2009 (AMEP 2009).
AutoCAD Architecture 2008 (ACA 2008) or AutoCAD MEP 2008 (AMEP 2008).

Both 32-bit and 64-bit is supported.
Any database like Access (MDB or .accdb) or SQL Server that can be connected with dbConnect within AutoCAD is supported. Other examples are SQL Server Express,  Oracle, ODBC, etc. AutoCAD 64-bit does only support Access 2010/2013 64-bit or the free Microsoft Office 12.0 Access Database Engine OLE DB Provider/Microsoft Access Database Engine 2010 Redistributable.
Excel is not supported as it is not a real database.

If you run 64bit AutoCAD you cannot have 32bit Office installed and also connect to MS Access database.

Any operating system that can run the above is supported from Windows XP, Windows Vista, Windows 7, Window 8 and Windows 8.1.




50 EUR for one license or less depending on the amount of licenses.

JTB World is a VAT-registered Swedish company. If your company is outside Sweden and is VAT-registered in EU (European Union) contact us by email before purchase with your company name, VAT-number and what you want to purchase and how many licenses so we can email an invoice and exclude the VAT (25%) on the purchase.


When you purchase with PayPal you can use your credit card or bank account where available. You will be emailed the license (this is done manually but normally within 24 hours). If you want to purchase for example 15 licenses add first 10 to the chart and then add 5.

You may also contact us for a quote and include how many licenses you want to purchase and your preferred payment method. If you have really many users that you want to give access to this software we can discuss a discounted price based on your particular situation. Educational discounts available. Network license needs can be met.

The license is perpetual and support is included. If you have more than one computer and you are the only user of the application one license is enough.

PayPal, share-it, Mastercard/Eurocard, Visa, American Express, and Diner's Club online are accepted. Alternatively, there is support for bank transfer/wire transfer, or Checks and Money Orders through postal mail. Online transfers via giropay and Nordea Solo are also supported. Refund policy.

To pay by PayPal you can also send payment to the account of at


Full documentation: ACA_DB-UserManual.pdf (466KB)

Setup files

  • JTB.AcaDbXMgd_17.dll (for 2009) or JTB.AcaDbXMgd_18.dll (for 2010-2012) or JTB.AcaDbXMgd_19.dll (for 2013)
  • ACA_db_samples.mdb
  • ACA_db_samples_2007.dwg or ACA_db_samples_2010.dwg or or ACA_db_samples_2013.dwg
  • ACA_db_samples.UDL
  • ACA_db_license.txt (sent by email from JTB World upon request)

Setup procedure

  1. Place the DLL file in a single local folder.
    For example C:\Program Files\JTB World\ACA_db .
  2. Place also the license file ACA_db_license.txt in the same folder.
  3. ACA_db_samples.UDL should be placed in the Data Links folder. The location is found easiest by using the command OPTIONS and Files>Data Sources Location within AutoCAD.
  4. Place the MDB in a folder with read/write access.

The DLL needs to be loaded by your AutoCAD application and that can be done in different ways. Use one of the following options.

  • Use the command NETLOAD and select the DLL. This loads the command in the current session only.
  • Create a menu command, toolbar button, ribbon button or palette tool using CUI and force load it before running the command.
    Macro or Command string:
    ^c^c(command "netload" "C:/Program Files/JTB World/ACA_db/JTB.AcaDbXMgd_18.dll") ACADBOUT;
  • Use one of the AutoLoad...reg files that can be provided. Double click on the file and accept to merge to the registry. This will make sure that the commands are available whenever you run AutoCAD.
  • Add the row below to your acad.lsp file so it loads automatically when AutoCAD starts.
    (command "netload" "C:/Program Files/JTB World/ACA_db/JTB.AcaDbXMgd_18.dll")


Prepare the database that holds information on what properties to synchronize and where. See ACA_DB-UserManual.pdf on how this is achieved.

Make sure there is an UDL file (data source) that points out the location of the main database.

In the CAD program use ACADBSETTINGS command to specify what data source to use as the main database.

Run the ACADBMAKE command to make new/existing drawing possible to sync.

Now use either of the commands ACADBOUT or ACADBIN to sync information into CAD or out from CAD.

The command line will show full details on if there are any problems and what data has been synchronized.

Some further details.

  • Property set data type and database data type must be compatible.
  • A PSD must be linked to a single table.
  • An object must not have 2 or more records linked from same db link.
  • An object must not have 2 or more records linked from different db links referencing same table.
  • All automatic properties are considered as read-only. Such properties can sync to database but cannot sync from database.
  • All automatic properties are considered as read-only. Such properties can sync to database but cannot sync from database.

Solution to the following error is to right click on the DLL file and click on Unblock.

Cannot load assembly. Error details: System.IO.FileLoadException: Could not
load file or assembly 'file:///C:\Users\JTB\AppData\Roaming\JTB
World\.....dll' or one of its dependencies. Operation is not
supported. (Exception from HRESULT: 0x80131515)
File name: 'file:///C:\Users\JTB\AppData\Roaming\JTB
World\....dll' ---> System.NotSupportedException: An attempt
was made to load an assembly from a network location which would have caused
the assembly to be sandboxed in previous versions of the .NET Framework. This
release of the .NET Framework does not enable CAS policy by default, so this
load may be dangerous. If this load is not intended to sandbox the assembly,
please enable the loadFromRemoteSources switch. See for more information.
at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String
codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint,
StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean
forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName
assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean
forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile,
Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm
hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks,
StackCrawlMark& stackMark)
at System.Reflection.Assembly.LoadFrom(String assemblyFile)
at Autodesk.AutoCAD.Runtime.ExtensionLoader.Load(String fileName)
at loadmgd()

See also more details here: Solution to System.IO.FileLoadException Could not load file or assembly error

Revision History

  • 2012-09-16 - version 4.0
    • Support for ACA 2013.
    • Support for 64-bit.
    •  IsDimensionInNumericFormat added to table JTBW_Properties. If yes, then dimensions are in numeric format. If no, then dimensions are in text format (feet & inches).
  • 2009-10-15 - version 3.0
    • Now with support for full 2-way synchronization of data both from and to ACA respectively database.
    • No need to use dbConnect to link object by object.
    • More features suppored for ACA 2010 like manual property set variants (Integer, List, Real, Text and True/False) and list data types.
  • 2009-03-23 - version 2.1
    • Full support for AutoCAD Architecture 2010
    • Support for table names with spaces or other non standard characters
  • 2008-05-05 - version 2
    • Several improvements under the hood
    • Support for multiple database sources
    • UI improvements
    • Licensing
    • Full support for AutoCAD Architecture 2009
  • 2008-02-22 - version 1.1
    • Support for AutoCAD Architecture 2009 beta
    • The bug in ACA 2008 is fixed in ACA 2009 that cause the following "harmless" crash message when closing AutoCAD. "AutoCAD Error Aborting - INTERNAL ERROR: Attempt to access AecScheduleDataServices after shutdown!"
  • 2007-12-28 - version 1
    • First release for AutoCAD Architecture 2008

Screenshot from version 2.1

ACA_db overview

Some ACA_db customers

United Technologies Research Center

Scott Tallon Walker
M+W Group U.S. Operations & Shanghai

More customers are found here.

Connect database information to your BIM model

ACA_db will help you expand and improve your BIM process. 

If you want other features added feel free to contact us with your wishes.

Tags: AutoCAD Architecture add-on, AutoCAD MEP add-on, AutoCAD Architecture app, AutoCAD MEP app, Building Information Modeling

© 2001-2014 JTB World. All rights reserved.